java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:24:14,552 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:24:14,554 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:24:14,569 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:24:14,570 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:24:14,571 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:24:14,573 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:24:14,575 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:24:14,578 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:24:14,579 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:24:14,580 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:24:14,629 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:24:14,658 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:24:14,658 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:24:14,659 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:24:14,659 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:24:14,660 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:24:14,660 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:24:14,660 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:24:14,660 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:24:14,661 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:24:14,661 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:24:14,661 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:24:14,661 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:24:14,662 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:24:14,662 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:24:14,662 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:24:14,662 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:24:14,662 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:24:14,663 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:24:14,663 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:24:14,663 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:24:14,663 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:24:14,663 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:24:14,664 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:24:14,664 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:24:14,664 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:24:14,664 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:24:14,664 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:24:14,665 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:24:14,665 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:24:14,665 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:24:14,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:24:14,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:24:14,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:24:14,726 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:24:14,726 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:24:14,727 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl [2018-09-30 20:24:14,728 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl' [2018-09-30 20:24:14,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:24:14,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:24:14,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:24:14,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:24:14,780 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:24:14,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... [2018-09-30 20:24:14,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... [2018-09-30 20:24:14,819 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:24:14,819 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:24:14,819 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:24:14,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:24:14,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:24:14,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:24:14,823 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:24:14,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... [2018-09-30 20:24:14,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... [2018-09-30 20:24:14,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... [2018-09-30 20:24:14,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... [2018-09-30 20:24:14,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... [2018-09-30 20:24:14,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... [2018-09-30 20:24:14,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... [2018-09-30 20:24:14,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:24:14,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:24:14,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:24:14,848 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:24:14,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:24:14,931 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 20:24:14,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:24:14,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:24:15,222 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:24:15,222 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:24:15 BoogieIcfgContainer [2018-09-30 20:24:15,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:24:15,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:24:15,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:24:15,227 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:24:15,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:14" (1/2) ... [2018-09-30 20:24:15,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3e9e1 and model type Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:24:15, skipping insertion in model container [2018-09-30 20:24:15,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:24:15" (2/2) ... [2018-09-30 20:24:15,232 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-ArraysIntegefied.bpl [2018-09-30 20:24:15,240 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:24:15,248 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:24:15,299 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:24:15,300 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:24:15,301 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:24:15,301 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:24:15,301 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:24:15,301 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:24:15,301 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:24:15,302 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:24:15,302 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:24:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-09-30 20:24:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:24:15,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:15,326 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 20:24:15,327 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:15,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:15,334 INFO L82 PathProgramCache]: Analyzing trace with hash 890493448, now seen corresponding path program 1 times [2018-09-30 20:24:15,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:15,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:15,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:15,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:15,527 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:24:15,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:24:15,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:24:15,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:24:15,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:24:15,557 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2018-09-30 20:24:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:15,625 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2018-09-30 20:24:15,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:24:15,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-09-30 20:24:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:15,645 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:24:15,645 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:24:15,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:24:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:24:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:24:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:24:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:24:15,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2018-09-30 20:24:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:15,686 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:24:15,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:24:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:24:15,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:24:15,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:15,687 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 20:24:15,687 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:15,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:15,687 INFO L82 PathProgramCache]: Analyzing trace with hash 892342412, now seen corresponding path program 1 times [2018-09-30 20:24:15,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:15,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:15,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:15,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:15,717 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:24:15,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:24:15,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:24:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:24:15,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:24:15,719 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2018-09-30 20:24:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:15,731 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:24:15,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:24:15,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-09-30 20:24:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:15,734 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:24:15,735 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:24:15,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:24:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:24:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:24:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:24:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:24:15,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-09-30 20:24:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:15,745 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:24:15,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:24:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:24:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:24:15,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:15,747 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:15,747 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:15,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:15,748 INFO L82 PathProgramCache]: Analyzing trace with hash -391235530, now seen corresponding path program 1 times [2018-09-30 20:24:15,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:15,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:15,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:15,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:15,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:15,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:15,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:15,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:15,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:15,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:24:15,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:24:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:24:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:24:15,911 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-09-30 20:24:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:15,942 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:24:15,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:24:15,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-09-30 20:24:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:15,943 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:24:15,944 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:24:15,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:24:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:24:15,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:24:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:24:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:24:15,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-09-30 20:24:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:15,948 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:24:15,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:24:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:24:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:24:15,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:15,949 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:15,950 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:15,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:15,950 INFO L82 PathProgramCache]: Analyzing trace with hash -602113312, now seen corresponding path program 2 times [2018-09-30 20:24:15,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:15,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:15,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:15,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:16,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:16,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:16,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:16,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:16,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:16,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:16,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:16,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:24:16,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:24:16,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:24:16,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:16,107 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-09-30 20:24:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:16,121 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:24:16,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:24:16,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-09-30 20:24:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:16,122 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:24:16,122 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:24:16,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:24:16,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:24:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:24:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:24:16,127 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-09-30 20:24:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:16,127 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:24:16,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:24:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:24:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:24:16,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:16,128 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:16,129 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:16,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash 334846090, now seen corresponding path program 3 times [2018-09-30 20:24:16,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:16,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:16,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:16,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:16,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:16,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:16,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:16,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:16,310 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:24:16,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:16,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:16,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:16,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:24:16,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:16,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:16,344 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-09-30 20:24:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:16,367 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:24:16,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:16,368 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-30 20:24:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:16,369 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:24:16,369 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:24:16,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:24:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:24:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:24:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:24:16,373 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-09-30 20:24:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:16,374 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:24:16,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:24:16,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:24:16,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:16,375 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:16,375 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:16,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:16,376 INFO L82 PathProgramCache]: Analyzing trace with hash -747417292, now seen corresponding path program 4 times [2018-09-30 20:24:16,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:16,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:16,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:16,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:16,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:16,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:16,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 20:24:16,663 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:16,699 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:16,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:16,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:16,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:16,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:16,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:16,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:16,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:16,737 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2018-09-30 20:24:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:16,764 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:24:16,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:16,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-09-30 20:24:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:16,767 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:24:16,768 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:24:16,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:24:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:24:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:24:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:24:16,773 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-09-30 20:24:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:16,773 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:24:16,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:24:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:24:16,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:16,775 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:16,775 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:16,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:16,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1016128734, now seen corresponding path program 5 times [2018-09-30 20:24:16,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:16,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:16,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:16,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:16,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:16,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:16,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:16,939 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:16,952 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:24:16,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:16,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:16,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:16,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:16,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:16,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:16,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:16,997 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-09-30 20:24:17,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:17,107 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:24:17,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:17,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-30 20:24:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:17,110 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:24:17,110 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:24:17,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:24:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:24:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:24:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:24:17,114 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-09-30 20:24:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:17,115 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:24:17,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:24:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:24:17,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:17,116 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:17,116 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:17,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash -267873400, now seen corresponding path program 6 times [2018-09-30 20:24:17,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:17,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:17,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:17,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:17,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:17,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:17,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:17,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:17,267 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:24:17,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:17,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:17,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:17,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:24:17,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:24:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:24:17,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:17,313 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 9 states. [2018-09-30 20:24:17,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:17,339 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:24:17,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:24:17,340 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-09-30 20:24:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:17,341 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:24:17,341 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:24:17,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:24:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:24:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:24:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:24:17,347 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-09-30 20:24:17,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:17,347 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:24:17,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:24:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:24:17,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:24:17,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:17,348 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:17,349 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:17,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1386947278, now seen corresponding path program 7 times [2018-09-30 20:24:17,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:17,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:17,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:17,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:17,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:17,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:17,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:17,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:17,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:17,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:17,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:24:17,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:24:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:24:17,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:24:17,923 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2018-09-30 20:24:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:17,966 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:24:17,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:24:17,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-09-30 20:24:17,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:17,968 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:24:17,968 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:24:17,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:24:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:24:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:24:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:24:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:24:17,974 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-09-30 20:24:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:17,975 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:24:17,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:24:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:24:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:24:17,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:17,977 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:17,977 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:17,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:17,978 INFO L82 PathProgramCache]: Analyzing trace with hash -223329828, now seen corresponding path program 8 times [2018-09-30 20:24:17,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:17,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:17,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:17,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:17,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:18,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:18,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:18,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:18,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:18,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:18,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:18,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:18,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:24:18,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:24:18,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:24:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:24:18,183 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-09-30 20:24:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:18,244 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:24:18,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:24:18,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-09-30 20:24:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:18,247 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:24:18,247 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:24:18,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:24:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:24:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:24:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:24:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:24:18,253 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-09-30 20:24:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:18,253 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:24:18,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:24:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:24:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:24:18,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:18,255 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:18,255 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:18,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:18,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1659551354, now seen corresponding path program 9 times [2018-09-30 20:24:18,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:18,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:18,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:18,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:18,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:18,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:18,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:18,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:18,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:24:18,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:18,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:18,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:18,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:24:18,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:24:18,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:24:18,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:24:18,635 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2018-09-30 20:24:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:18,886 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:24:18,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:24:18,886 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-09-30 20:24:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:18,887 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:24:18,887 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:24:18,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:24:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:24:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:24:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:24:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:24:18,892 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-09-30 20:24:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:18,893 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:24:18,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:24:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:24:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:24:18,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:18,894 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:18,895 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:18,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:18,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2009179088, now seen corresponding path program 10 times [2018-09-30 20:24:18,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:18,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:18,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:18,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:18,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:19,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:19,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:19,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:19,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:19,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:19,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:19,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:19,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:24:19,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:24:19,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:24:19,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:24:19,235 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 13 states. [2018-09-30 20:24:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:19,318 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:24:19,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:24:19,322 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-09-30 20:24:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:19,323 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:24:19,323 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:24:19,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:24:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:24:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:24:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:24:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:24:19,329 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-09-30 20:24:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:19,330 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:24:19,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:24:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:24:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:24:19,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:19,332 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:19,332 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:19,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:19,332 INFO L82 PathProgramCache]: Analyzing trace with hash 782635482, now seen corresponding path program 11 times [2018-09-30 20:24:19,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:19,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:19,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:19,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:19,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:19,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:19,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:19,555 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:19,575 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:24:19,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:19,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:19,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:19,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:24:19,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:24:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:24:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:24:19,618 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 14 states. [2018-09-30 20:24:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:19,663 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:24:19,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:24:19,663 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-09-30 20:24:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:19,664 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:24:19,665 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:24:19,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:24:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:24:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:24:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:24:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:24:19,670 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-09-30 20:24:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:19,671 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:24:19,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:24:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:24:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:24:19,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:19,672 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:19,672 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:19,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:19,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1233576580, now seen corresponding path program 12 times [2018-09-30 20:24:19,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:19,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:19,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:19,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:19,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:19,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:19,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:19,884 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:20,044 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:24:20,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:20,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:20,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:20,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:24:20,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:24:20,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:24:20,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:24:20,097 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 15 states. [2018-09-30 20:24:20,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:20,210 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:24:20,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:24:20,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-09-30 20:24:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:20,212 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:24:20,212 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:24:20,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:24:20,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:24:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:24:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:24:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:24:20,216 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-09-30 20:24:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:20,217 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:24:20,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:24:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:24:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:24:20,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:20,218 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:20,218 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:20,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:20,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1893420590, now seen corresponding path program 13 times [2018-09-30 20:24:20,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:20,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:20,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:20,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:20,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:20,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:20,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:20,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:20,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:20,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:20,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:24:20,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:24:20,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:24:20,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:24:20,523 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2018-09-30 20:24:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:20,625 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:24:20,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:24:20,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-09-30 20:24:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:20,626 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:24:20,626 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:24:20,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:24:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:24:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:24:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:24:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:24:20,633 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-09-30 20:24:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:20,639 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:24:20,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:24:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:24:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:24:20,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:20,641 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:20,641 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:20,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:20,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1151478568, now seen corresponding path program 14 times [2018-09-30 20:24:20,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:20,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:20,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:20,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:20,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:21,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:21,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:21,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:21,493 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:21,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:21,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:21,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:21,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:24:21,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:24:21,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:24:21,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:24:21,533 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 17 states. [2018-09-30 20:24:21,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:21,586 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:24:21,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:24:21,586 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-09-30 20:24:21,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:21,587 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:24:21,587 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:24:21,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:24:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:24:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:24:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:24:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:24:21,593 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-09-30 20:24:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:21,593 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:24:21,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:24:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:24:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:24:21,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:21,594 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:21,594 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:21,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1586034306, now seen corresponding path program 15 times [2018-09-30 20:24:21,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:21,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:21,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:21,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:21,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:21,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:21,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:21,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:21,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:24:21,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:21,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:21,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:21,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:24:21,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:24:21,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:24:21,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:24:21,906 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 18 states. [2018-09-30 20:24:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:21,940 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:24:21,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:24:21,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-09-30 20:24:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:21,941 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:24:21,942 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:24:21,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:24:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:24:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:24:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:24:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:24:21,948 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-09-30 20:24:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:21,948 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:24:21,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:24:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:24:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:24:21,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:21,949 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:21,950 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:21,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:21,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1318531884, now seen corresponding path program 16 times [2018-09-30 20:24:21,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:21,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:21,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:21,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:21,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:22,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:22,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:22,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:22,382 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:22,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:22,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:22,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:22,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:24:22,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:24:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:24:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:24:22,434 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 19 states. [2018-09-30 20:24:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:22,594 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:24:22,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:24:22,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-09-30 20:24:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:22,595 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:24:22,595 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:24:22,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:24:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:24:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:24:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:24:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:24:22,602 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-09-30 20:24:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:22,602 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:24:22,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:24:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:24:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:24:22,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:22,607 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:22,607 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:22,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:22,607 INFO L82 PathProgramCache]: Analyzing trace with hash -561837354, now seen corresponding path program 17 times [2018-09-30 20:24:22,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:22,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:22,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:22,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:22,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:23,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:23,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:23,220 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:23,303 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:24:23,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:23,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:23,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:23,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:24:23,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:24:23,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:24:23,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:24:23,350 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 20 states. [2018-09-30 20:24:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:23,404 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:24:23,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:24:23,405 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-09-30 20:24:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:23,406 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:24:23,406 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:24:23,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:24:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:24:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:24:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:24:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:24:23,412 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-09-30 20:24:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:23,412 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:24:23,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:24:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:24:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:24:23,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:23,413 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:23,414 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:23,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1611070848, now seen corresponding path program 18 times [2018-09-30 20:24:23,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:23,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:23,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:23,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:23,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:23,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:23,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:23,682 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:23,703 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:24:23,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:23,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:23,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:23,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:24:23,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:24:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:24:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:24:23,756 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 21 states. [2018-09-30 20:24:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:23,808 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:24:23,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:24:23,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-09-30 20:24:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:23,809 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:24:23,809 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:24:23,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:24:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:24:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:24:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:24:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 20:24:23,814 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-09-30 20:24:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:23,814 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 20:24:23,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:24:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 20:24:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:24:23,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:23,815 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:23,815 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:23,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:23,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1013085398, now seen corresponding path program 19 times [2018-09-30 20:24:23,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:23,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:23,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:23,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:23,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:24,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:24,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:24,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:24,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:24,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:24,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:24:24,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:24:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:24:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:24:24,268 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 22 states. [2018-09-30 20:24:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:24,357 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:24:24,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:24:24,357 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-09-30 20:24:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:24,358 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:24:24,358 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:24:24,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:24:24,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:24:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:24:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:24:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 20:24:24,361 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-09-30 20:24:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:24,362 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 20:24:24,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:24:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 20:24:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:24:24,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:24,362 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:24,363 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:24,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash 947991508, now seen corresponding path program 20 times [2018-09-30 20:24:24,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:24,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:24,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:24,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:24,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:24,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:24,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:24,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:24,949 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:24,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:24,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:25,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:25,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:24:25,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:24:25,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:24:25,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:24:25,007 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 23 states. [2018-09-30 20:24:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:25,152 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:24:25,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:24:25,154 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-09-30 20:24:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:25,155 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:24:25,155 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:24:25,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:24:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:24:25,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:24:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:24:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 20:24:25,159 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-09-30 20:24:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:25,159 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 20:24:25,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:24:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 20:24:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:24:25,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:25,160 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:25,160 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:25,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash -861112450, now seen corresponding path program 21 times [2018-09-30 20:24:25,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:25,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:25,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:25,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:25,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:25,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:25,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:25,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:25,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:24:25,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:25,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:25,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:25,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:24:25,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:24:25,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:24:25,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:24:25,902 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 24 states. [2018-09-30 20:24:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:25,988 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:24:25,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:24:25,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-09-30 20:24:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:25,989 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:24:25,989 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:24:25,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:24:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:24:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:24:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:24:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 20:24:25,991 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-09-30 20:24:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:25,992 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 20:24:25,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:24:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 20:24:25,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:24:25,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:25,993 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:25,993 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:25,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:25,993 INFO L82 PathProgramCache]: Analyzing trace with hash 215602728, now seen corresponding path program 22 times [2018-09-30 20:24:25,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:25,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:25,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:25,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:25,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:26,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:26,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:26,468 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:26,488 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:26,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:26,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:26,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:26,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:24:26,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:24:26,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:24:26,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:24:26,531 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 25 states. [2018-09-30 20:24:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:26,577 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:24:26,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:24:26,578 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-09-30 20:24:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:26,579 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:24:26,579 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:24:26,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:24:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:24:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:24:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:24:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 20:24:26,583 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-09-30 20:24:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:26,583 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 20:24:26,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:24:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 20:24:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:24:26,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:26,584 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:26,584 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:26,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:26,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1534865454, now seen corresponding path program 23 times [2018-09-30 20:24:26,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:26,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:26,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:26,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:26,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:27,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:27,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:27,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:27,087 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:24:27,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:27,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:27,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:27,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:24:27,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:24:27,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:24:27,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:24:27,135 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 26 states. [2018-09-30 20:24:27,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:27,179 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:24:27,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:24:27,180 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-09-30 20:24:27,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:27,180 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:24:27,181 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:24:27,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:24:27,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:24:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:24:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:24:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 20:24:27,184 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-09-30 20:24:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:27,184 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 20:24:27,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:24:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 20:24:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:24:27,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:27,185 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:27,185 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:27,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:27,186 INFO L82 PathProgramCache]: Analyzing trace with hash -35330948, now seen corresponding path program 24 times [2018-09-30 20:24:27,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:27,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:27,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:27,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:27,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:28,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:28,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:28,468 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:28,497 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:24:28,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:28,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:28,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:28,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:24:28,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:24:28,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:24:28,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:24:28,552 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 27 states. [2018-09-30 20:24:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:28,738 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:24:28,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:24:28,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-09-30 20:24:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:28,740 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:24:28,741 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:24:28,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:24:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:24:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:24:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:24:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 20:24:28,744 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-09-30 20:24:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:28,745 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 20:24:28,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:24:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 20:24:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:24:28,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:28,745 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:28,746 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:28,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash -503868378, now seen corresponding path program 25 times [2018-09-30 20:24:28,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:28,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:28,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:28,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:28,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:29,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:29,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:29,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:29,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:29,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:29,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:24:29,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:24:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:24:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:24:29,510 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 28 states. [2018-09-30 20:24:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:29,558 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:24:29,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:24:29,558 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-09-30 20:24:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:29,559 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:24:29,559 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:24:29,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:24:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:24:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:24:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:24:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 20:24:29,563 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-09-30 20:24:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:29,563 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 20:24:29,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:24:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 20:24:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:24:29,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:29,564 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:29,564 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:29,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:29,564 INFO L82 PathProgramCache]: Analyzing trace with hash 410410704, now seen corresponding path program 26 times [2018-09-30 20:24:29,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:29,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:29,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:29,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:29,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:30,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:30,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:30,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:30,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:30,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:30,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:30,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:30,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:24:30,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:24:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:24:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:24:30,553 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 29 states. [2018-09-30 20:24:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:30,693 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:24:30,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:24:30,694 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-09-30 20:24:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:30,695 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:24:30,695 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:24:30,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:24:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:24:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:24:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:24:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 20:24:30,699 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-09-30 20:24:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:30,699 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 20:24:30,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:24:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 20:24:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:24:30,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:30,700 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:30,700 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:30,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:30,701 INFO L82 PathProgramCache]: Analyzing trace with hash 131843194, now seen corresponding path program 27 times [2018-09-30 20:24:30,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:30,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:30,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:30,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:30,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:31,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:31,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:31,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:31,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:24:31,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:31,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:31,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:31,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:24:31,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:24:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:24:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:24:31,938 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 30 states. [2018-09-30 20:24:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:32,008 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:24:32,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:24:32,008 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-09-30 20:24:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:32,011 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:24:32,011 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:24:32,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:24:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:24:32,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 20:24:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:24:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 20:24:32,017 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-09-30 20:24:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:32,018 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 20:24:32,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:24:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 20:24:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:24:32,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:32,021 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:32,021 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:32,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:32,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1432503588, now seen corresponding path program 28 times [2018-09-30 20:24:32,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:32,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:32,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:32,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:32,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:32,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:32,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:32,465 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:32,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:32,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:32,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:32,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:32,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:24:32,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:24:32,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:24:32,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:24:32,547 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 31 states. [2018-09-30 20:24:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:32,646 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:24:32,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:24:32,646 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-09-30 20:24:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:32,648 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:24:32,648 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:24:32,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:24:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:24:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 20:24:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 20:24:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 20:24:32,652 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-09-30 20:24:32,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:32,653 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 20:24:32,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:24:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 20:24:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:24:32,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:32,654 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:32,654 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:32,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:32,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2063310642, now seen corresponding path program 29 times [2018-09-30 20:24:32,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:32,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:32,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:32,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:32,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:33,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:33,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:33,448 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:33,481 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:24:33,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:33,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:33,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:33,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:24:33,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:24:33,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:24:33,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:24:33,523 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 32 states. [2018-09-30 20:24:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:33,620 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:24:33,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:24:33,621 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-09-30 20:24:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:33,622 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:24:33,622 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:24:33,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:24:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:24:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 20:24:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 20:24:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 20:24:33,626 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-09-30 20:24:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:33,626 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 20:24:33,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:24:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 20:24:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 20:24:33,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:33,627 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:33,627 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:33,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1719888008, now seen corresponding path program 30 times [2018-09-30 20:24:33,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:33,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:33,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:33,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:33,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:34,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:34,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:34,171 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:34,211 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:24:34,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:34,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:34,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:34,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:24:34,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:24:34,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:24:34,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:24:34,253 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 33 states. [2018-09-30 20:24:34,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:34,346 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:24:34,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:24:34,346 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-09-30 20:24:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:34,347 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:24:34,347 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:24:34,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:24:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:24:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:24:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:24:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 20:24:34,352 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-09-30 20:24:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:34,353 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 20:24:34,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:24:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 20:24:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 20:24:34,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:34,354 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:34,354 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:34,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:34,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1270519518, now seen corresponding path program 31 times [2018-09-30 20:24:34,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:34,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:34,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:34,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:34,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:34,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:34,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:34,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:34,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:35,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:35,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:24:35,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:24:35,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:24:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:24:35,040 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 34 states. [2018-09-30 20:24:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:35,101 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:24:35,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:24:35,101 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-09-30 20:24:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:35,103 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:24:35,103 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 20:24:35,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:24:35,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 20:24:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 20:24:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 20:24:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 20:24:35,107 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-09-30 20:24:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:35,108 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 20:24:35,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:24:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 20:24:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 20:24:35,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:35,109 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:35,109 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:35,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1248242228, now seen corresponding path program 32 times [2018-09-30 20:24:35,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:35,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:35,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:35,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:35,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:35,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:35,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:35,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:35,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:35,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:35,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:35,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:35,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:24:35,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:24:35,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:24:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:24:35,739 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 35 states. [2018-09-30 20:24:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:35,823 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:24:35,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:24:35,823 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-09-30 20:24:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:35,825 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:24:35,825 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:24:35,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:24:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:24:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:24:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:24:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 20:24:35,829 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-09-30 20:24:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:35,829 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 20:24:35,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:24:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 20:24:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:24:35,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:35,830 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:35,830 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:35,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash -596451978, now seen corresponding path program 33 times [2018-09-30 20:24:35,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:35,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:35,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:35,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:35,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:36,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:36,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:36,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:36,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:24:36,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:36,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:36,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:36,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:24:36,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:24:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:24:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:24:36,511 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 36 states. [2018-09-30 20:24:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:36,589 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:24:36,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:24:36,589 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-09-30 20:24:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:36,590 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:24:36,591 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 20:24:36,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:24:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 20:24:36,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 20:24:36,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 20:24:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 20:24:36,595 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-09-30 20:24:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:36,595 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 20:24:36,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:24:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 20:24:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 20:24:36,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:36,596 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:36,597 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:36,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:36,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1720483872, now seen corresponding path program 34 times [2018-09-30 20:24:36,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:36,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:36,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:36,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:36,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:37,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:37,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:37,330 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:37,360 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:37,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:37,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:37,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:37,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:24:37,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:24:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:24:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:24:37,405 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 37 states. [2018-09-30 20:24:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:37,470 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:24:37,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:24:37,471 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-09-30 20:24:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:37,473 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:24:37,473 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:24:37,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:24:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:24:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 20:24:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:24:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 20:24:37,476 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-09-30 20:24:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:37,477 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 20:24:37,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:24:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 20:24:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:24:37,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:37,478 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:37,478 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:37,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash 811646410, now seen corresponding path program 35 times [2018-09-30 20:24:37,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:37,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:37,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:37,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:37,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:38,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:38,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:38,761 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:38,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:24:38,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:38,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:38,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:38,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:24:38,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:24:38,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:24:38,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:24:38,967 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 38 states. [2018-09-30 20:24:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:39,111 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:24:39,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:24:39,112 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-09-30 20:24:39,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:39,114 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:24:39,114 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 20:24:39,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:24:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 20:24:39,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 20:24:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 20:24:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 20:24:39,119 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-09-30 20:24:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:39,119 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 20:24:39,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:24:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 20:24:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 20:24:39,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:39,134 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:39,134 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:39,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:39,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1428821620, now seen corresponding path program 36 times [2018-09-30 20:24:39,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:39,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:39,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:39,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:39,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:39,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:39,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:39,764 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:39,811 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:24:39,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:39,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:39,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:39,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:24:39,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:24:39,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:24:39,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:24:39,866 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 39 states. [2018-09-30 20:24:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:39,948 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 20:24:39,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:24:39,948 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-09-30 20:24:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:39,950 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:24:39,950 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:24:39,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:24:39,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:24:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 20:24:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:24:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 20:24:39,955 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-09-30 20:24:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:39,955 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 20:24:39,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:24:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 20:24:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 20:24:39,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:39,957 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:39,957 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:39,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash -823981538, now seen corresponding path program 37 times [2018-09-30 20:24:39,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:39,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:39,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:39,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:39,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:41,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:41,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:41,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:41,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:41,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:41,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:24:41,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:24:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:24:41,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:24:41,149 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 40 states. [2018-09-30 20:24:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:41,610 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 20:24:41,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:24:41,610 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-09-30 20:24:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:41,614 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:24:41,614 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 20:24:41,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:24:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 20:24:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 20:24:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 20:24:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 20:24:41,618 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 154 [2018-09-30 20:24:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:41,619 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 20:24:41,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:24:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 20:24:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 20:24:41,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:41,620 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:41,620 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:41,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:41,620 INFO L82 PathProgramCache]: Analyzing trace with hash 373692616, now seen corresponding path program 38 times [2018-09-30 20:24:41,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:41,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:41,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:41,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:41,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:42,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:42,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:42,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:42,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:42,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:42,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:42,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:42,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:24:42,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:24:42,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:24:42,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:24:42,521 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 41 states. [2018-09-30 20:24:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:43,468 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 20:24:43,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:24:43,468 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-09-30 20:24:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:43,469 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:24:43,470 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 20:24:43,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:24:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 20:24:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 20:24:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 20:24:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 20:24:43,473 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 158 [2018-09-30 20:24:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:43,474 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 20:24:43,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:24:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 20:24:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 20:24:43,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:43,475 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:43,475 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:43,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:43,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1026702734, now seen corresponding path program 39 times [2018-09-30 20:24:43,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:43,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:43,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:43,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:44,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:44,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:44,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:24:44,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:44,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:44,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:24:44,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:24:44,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:24:44,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:24:44,526 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 42 states. [2018-09-30 20:24:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:44,631 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 20:24:44,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:24:44,632 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-09-30 20:24:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:44,634 INFO L225 Difference]: With dead ends: 169 [2018-09-30 20:24:44,634 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 20:24:44,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:24:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 20:24:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 20:24:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 20:24:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 20:24:44,638 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 162 [2018-09-30 20:24:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:44,638 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 20:24:44,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:24:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 20:24:44,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 20:24:44,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:44,640 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:44,640 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:44,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:44,640 INFO L82 PathProgramCache]: Analyzing trace with hash 716474140, now seen corresponding path program 40 times [2018-09-30 20:24:44,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:44,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:44,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:44,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:45,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:45,561 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:45,596 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:45,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:45,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:45,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:24:45,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:24:45,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:24:45,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:24:45,670 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 43 states. [2018-09-30 20:24:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:45,864 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 20:24:45,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:24:45,864 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-09-30 20:24:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:45,866 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:24:45,866 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:24:45,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:24:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:24:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 20:24:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 20:24:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 20:24:45,871 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 166 [2018-09-30 20:24:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:45,871 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 20:24:45,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:24:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 20:24:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 20:24:45,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:45,872 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:45,873 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:45,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash 49604294, now seen corresponding path program 41 times [2018-09-30 20:24:45,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:45,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:45,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:45,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:46,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:46,697 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:46,755 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:24:46,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:46,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:46,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:24:46,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:24:46,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:24:46,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:24:46,823 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 44 states. [2018-09-30 20:24:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:47,324 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 20:24:47,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:24:47,324 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-09-30 20:24:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:47,325 INFO L225 Difference]: With dead ends: 177 [2018-09-30 20:24:47,326 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 20:24:47,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:24:47,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 20:24:47,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 20:24:47,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 20:24:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 20:24:47,330 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 170 [2018-09-30 20:24:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:47,330 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 20:24:47,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:24:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 20:24:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 20:24:47,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:47,331 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:47,331 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:47,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:47,332 INFO L82 PathProgramCache]: Analyzing trace with hash -11968144, now seen corresponding path program 42 times [2018-09-30 20:24:47,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:47,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:47,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:47,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:49,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:49,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:49,135 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:24:49,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:49,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:49,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:24:49,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:24:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:24:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:24:49,202 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 45 states. [2018-09-30 20:24:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:49,351 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 20:24:49,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:24:49,351 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-09-30 20:24:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:49,352 INFO L225 Difference]: With dead ends: 181 [2018-09-30 20:24:49,353 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 20:24:49,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:24:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 20:24:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 20:24:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 20:24:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 20:24:49,357 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 174 [2018-09-30 20:24:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:49,358 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 20:24:49,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:24:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 20:24:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 20:24:49,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:49,359 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:49,359 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:49,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:49,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1915516698, now seen corresponding path program 43 times [2018-09-30 20:24:49,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:49,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:49,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:49,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:50,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:50,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:50,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:50,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:24:50,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:24:50,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:24:50,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:24:50,322 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 46 states. [2018-09-30 20:24:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:50,562 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 20:24:50,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:24:50,563 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-09-30 20:24:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:50,564 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:24:50,564 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 20:24:50,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:24:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 20:24:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 20:24:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 20:24:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 20:24:50,569 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 178 [2018-09-30 20:24:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:50,569 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 20:24:50,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:24:50,569 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 20:24:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 20:24:50,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:50,570 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:50,571 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:50,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash -321345596, now seen corresponding path program 44 times [2018-09-30 20:24:50,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:50,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:50,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:50,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:51,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:51,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:51,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:51,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:51,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:51,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:24:51,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:24:51,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:24:51,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:24:51,850 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 47 states. [2018-09-30 20:24:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:51,937 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 20:24:51,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:24:51,938 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-09-30 20:24:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:51,940 INFO L225 Difference]: With dead ends: 189 [2018-09-30 20:24:51,940 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 20:24:51,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:24:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 20:24:51,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 20:24:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 20:24:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 20:24:51,944 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 182 [2018-09-30 20:24:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:51,945 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 20:24:51,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:24:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 20:24:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 20:24:51,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:51,946 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:51,946 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:51,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:51,947 INFO L82 PathProgramCache]: Analyzing trace with hash -548899986, now seen corresponding path program 45 times [2018-09-30 20:24:51,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:51,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:51,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:51,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:53,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:53,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:53,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 20:24:53,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:53,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:53,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:24:53,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:24:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:24:53,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:24:53,498 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 48 states. [2018-09-30 20:24:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:53,652 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 20:24:53,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:24:53,652 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-09-30 20:24:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:53,653 INFO L225 Difference]: With dead ends: 193 [2018-09-30 20:24:53,653 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 20:24:53,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:24:53,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 20:24:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 20:24:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 20:24:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 20:24:53,658 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 186 [2018-09-30 20:24:53,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:53,658 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 20:24:53,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:24:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 20:24:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 20:24:53,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:53,660 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:53,660 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:53,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash 943086104, now seen corresponding path program 46 times [2018-09-30 20:24:53,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:53,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:53,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:53,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:54,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:54,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:54,779 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:54,817 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:54,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:54,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:54,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:54,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:24:54,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:24:54,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:24:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:24:54,903 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 49 states. [2018-09-30 20:24:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:55,041 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 20:24:55,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:24:55,041 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-09-30 20:24:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:55,043 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:24:55,043 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 20:24:55,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:24:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 20:24:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 20:24:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 20:24:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 20:24:55,046 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 190 [2018-09-30 20:24:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:55,047 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 20:24:55,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:24:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 20:24:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 20:24:55,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:55,048 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:55,048 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:55,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:55,049 INFO L82 PathProgramCache]: Analyzing trace with hash 85777346, now seen corresponding path program 47 times [2018-09-30 20:24:55,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:55,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:55,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:55,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:55,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:57,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:57,408 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:57,621 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 20:24:57,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:57,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:57,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:24:57,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:24:57,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:24:57,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:24:57,708 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 50 states. [2018-09-30 20:24:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:57,879 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 20:24:57,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:24:57,880 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-09-30 20:24:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:57,881 INFO L225 Difference]: With dead ends: 201 [2018-09-30 20:24:57,882 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 20:24:57,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:24:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 20:24:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 20:24:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 20:24:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 20:24:57,885 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 194 [2018-09-30 20:24:57,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:57,886 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 20:24:57,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:24:57,886 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 20:24:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 20:24:57,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:57,887 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:57,887 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:57,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:57,887 INFO L82 PathProgramCache]: Analyzing trace with hash 305559660, now seen corresponding path program 48 times [2018-09-30 20:24:57,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:57,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:57,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:57,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:59,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:59,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:59,479 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:59,540 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:24:59,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:59,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:59,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:59,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:24:59,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:24:59,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:24:59,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:24:59,605 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 51 states. [2018-09-30 20:24:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:59,713 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 20:24:59,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:24:59,713 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-09-30 20:24:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:59,715 INFO L225 Difference]: With dead ends: 205 [2018-09-30 20:24:59,715 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 20:24:59,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:24:59,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 20:24:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 20:24:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 20:24:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 20:24:59,719 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 198 [2018-09-30 20:24:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:59,719 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 20:24:59,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:24:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 20:24:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 20:24:59,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:59,720 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-09-30 20:24:59,720 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:59,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1971474410, now seen corresponding path program 49 times [2018-09-30 20:24:59,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:59,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:59,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:59,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:01,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:01,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:01,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:01,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:25:01,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:25:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:25:01,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:25:01,576 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 52 states. [2018-09-30 20:25:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:01,677 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 20:25:01,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:25:01,678 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-09-30 20:25:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:01,680 INFO L225 Difference]: With dead ends: 209 [2018-09-30 20:25:01,680 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 20:25:01,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:25:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 20:25:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 20:25:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 20:25:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-30 20:25:01,684 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 202 [2018-09-30 20:25:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:01,684 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-30 20:25:01,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:25:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-30 20:25:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 20:25:01,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:01,685 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:01,686 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:01,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1750269248, now seen corresponding path program 50 times [2018-09-30 20:25:01,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:01,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:01,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:01,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:02,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:02,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:02,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:02,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:02,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:02,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:02,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:02,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:25:02,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:25:02,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:25:02,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:25:02,996 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 53 states. [2018-09-30 20:25:03,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:03,465 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 20:25:03,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:25:03,466 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-09-30 20:25:03,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:03,468 INFO L225 Difference]: With dead ends: 213 [2018-09-30 20:25:03,468 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 20:25:03,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:25:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 20:25:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 20:25:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 20:25:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-30 20:25:03,472 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 206 [2018-09-30 20:25:03,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:03,473 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-30 20:25:03,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:25:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-30 20:25:03,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 20:25:03,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:03,474 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:03,474 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:03,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:03,475 INFO L82 PathProgramCache]: Analyzing trace with hash 37679210, now seen corresponding path program 51 times [2018-09-30 20:25:03,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:03,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:03,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:03,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:04,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:04,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:04,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:05,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 20:25:05,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:05,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:05,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:05,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:25:05,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:25:05,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:25:05,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:25:05,112 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 54 states. [2018-09-30 20:25:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:05,265 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-30 20:25:05,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:25:05,265 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-09-30 20:25:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:05,267 INFO L225 Difference]: With dead ends: 217 [2018-09-30 20:25:05,267 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 20:25:05,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:25:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 20:25:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 20:25:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 20:25:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-30 20:25:05,270 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 210 [2018-09-30 20:25:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:05,270 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-30 20:25:05,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:25:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-30 20:25:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 20:25:05,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:05,272 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:05,272 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:05,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash -781321964, now seen corresponding path program 52 times [2018-09-30 20:25:05,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:05,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:05,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:05,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:06,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:06,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:06,769 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:06,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:06,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:06,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:06,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:06,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:25:06,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:25:06,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:25:06,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:25:06,897 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 55 states. [2018-09-30 20:25:07,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:07,087 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-30 20:25:07,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:25:07,087 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-09-30 20:25:07,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:07,089 INFO L225 Difference]: With dead ends: 221 [2018-09-30 20:25:07,089 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 20:25:07,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:25:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 20:25:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 20:25:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 20:25:07,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-30 20:25:07,093 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 214 [2018-09-30 20:25:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:07,093 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-30 20:25:07,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:25:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-30 20:25:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 20:25:07,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:07,095 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:07,095 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:07,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:07,095 INFO L82 PathProgramCache]: Analyzing trace with hash -348873538, now seen corresponding path program 53 times [2018-09-30 20:25:07,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:07,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:07,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:07,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:08,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:08,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:08,372 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:08,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 20:25:08,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:08,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:08,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:08,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:25:08,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:25:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:25:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:25:08,511 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 56 states. [2018-09-30 20:25:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:08,605 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-30 20:25:08,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:25:08,605 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-09-30 20:25:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:08,606 INFO L225 Difference]: With dead ends: 225 [2018-09-30 20:25:08,606 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 20:25:08,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:25:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 20:25:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 20:25:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 20:25:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-30 20:25:08,609 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 218 [2018-09-30 20:25:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:08,609 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-30 20:25:08,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:25:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-30 20:25:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 20:25:08,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:08,610 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:08,610 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:08,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:08,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1269998744, now seen corresponding path program 54 times [2018-09-30 20:25:08,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:08,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:08,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:08,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:08,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:09,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:09,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:09,996 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:10,073 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:25:10,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:10,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:10,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:10,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:25:10,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:25:10,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:25:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:25:10,171 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 57 states. [2018-09-30 20:25:10,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:10,332 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-30 20:25:10,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:25:10,332 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-09-30 20:25:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:10,333 INFO L225 Difference]: With dead ends: 229 [2018-09-30 20:25:10,334 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 20:25:10,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:25:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 20:25:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 20:25:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 20:25:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-30 20:25:10,338 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 222 [2018-09-30 20:25:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:10,338 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-30 20:25:10,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:25:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-30 20:25:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 20:25:10,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:10,340 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:10,340 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:10,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1338854126, now seen corresponding path program 55 times [2018-09-30 20:25:10,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:10,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:10,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:10,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:11,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:11,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:11,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:11,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:11,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:11,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:25:11,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:25:11,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:25:11,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:25:11,832 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 58 states. [2018-09-30 20:25:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:12,725 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-09-30 20:25:12,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:25:12,726 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-09-30 20:25:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:12,727 INFO L225 Difference]: With dead ends: 233 [2018-09-30 20:25:12,728 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 20:25:12,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:25:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 20:25:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 20:25:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 20:25:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-09-30 20:25:12,732 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 226 [2018-09-30 20:25:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:12,732 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-09-30 20:25:12,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:25:12,732 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-09-30 20:25:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 20:25:12,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:12,733 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:12,734 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:12,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:12,734 INFO L82 PathProgramCache]: Analyzing trace with hash 555690428, now seen corresponding path program 56 times [2018-09-30 20:25:12,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:12,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:12,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:12,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:12,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:14,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:14,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:14,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:14,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:14,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:14,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:14,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:14,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:25:14,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:25:14,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:25:14,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:25:14,465 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 59 states. [2018-09-30 20:25:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:14,702 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-09-30 20:25:14,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:25:14,702 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-09-30 20:25:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:14,704 INFO L225 Difference]: With dead ends: 237 [2018-09-30 20:25:14,704 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 20:25:14,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:25:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 20:25:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 20:25:14,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 20:25:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-09-30 20:25:14,708 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 230 [2018-09-30 20:25:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:14,708 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-09-30 20:25:14,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:25:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-09-30 20:25:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 20:25:14,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:14,709 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:14,709 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:14,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:14,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1475528346, now seen corresponding path program 57 times [2018-09-30 20:25:14,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:14,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:14,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:14,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:14,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:15,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:15,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:16,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:16,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 20:25:16,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:16,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:16,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:16,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:25:16,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:25:16,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:25:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:25:16,161 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 60 states. [2018-09-30 20:25:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:16,275 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-09-30 20:25:16,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:25:16,276 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-09-30 20:25:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:16,277 INFO L225 Difference]: With dead ends: 241 [2018-09-30 20:25:16,278 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 20:25:16,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:25:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 20:25:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 20:25:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 20:25:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-09-30 20:25:16,281 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 234 [2018-09-30 20:25:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:16,281 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-09-30 20:25:16,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:25:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-09-30 20:25:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 20:25:16,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:16,282 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:16,283 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:16,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash -457743344, now seen corresponding path program 58 times [2018-09-30 20:25:16,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:16,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:16,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:16,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:16,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:17,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:17,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:17,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:17,889 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:17,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:17,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:17,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:17,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:25:17,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:25:17,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:25:17,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:25:17,986 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 61 states. [2018-09-30 20:25:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:18,186 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-09-30 20:25:18,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:25:18,187 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-09-30 20:25:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:18,188 INFO L225 Difference]: With dead ends: 245 [2018-09-30 20:25:18,188 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 20:25:18,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:25:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 20:25:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-30 20:25:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 20:25:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-09-30 20:25:18,192 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 238 [2018-09-30 20:25:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:18,192 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-09-30 20:25:18,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:25:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-09-30 20:25:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 20:25:18,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:18,194 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:18,194 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:18,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:18,194 INFO L82 PathProgramCache]: Analyzing trace with hash 362293690, now seen corresponding path program 59 times [2018-09-30 20:25:18,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:18,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:18,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:18,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:19,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:19,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:19,836 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:19,914 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 20:25:19,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:19,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:19,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:19,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:25:19,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:25:19,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:25:19,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:25:19,983 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 62 states. [2018-09-30 20:25:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:20,142 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-09-30 20:25:20,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:25:20,142 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-09-30 20:25:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:20,144 INFO L225 Difference]: With dead ends: 249 [2018-09-30 20:25:20,144 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 20:25:20,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:25:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 20:25:20,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 20:25:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 20:25:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-09-30 20:25:20,149 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 242 [2018-09-30 20:25:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:20,149 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-09-30 20:25:20,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:25:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-09-30 20:25:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 20:25:20,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:20,151 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:20,151 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:20,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1209398684, now seen corresponding path program 60 times [2018-09-30 20:25:20,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:20,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:20,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:20,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:20,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:21,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:21,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:21,716 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:21,793 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:25:21,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:21,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:21,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:21,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 20:25:21,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:25:21,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:25:21,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:25:21,899 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 63 states. [2018-09-30 20:25:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:22,088 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-09-30 20:25:22,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:25:22,089 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-09-30 20:25:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:22,091 INFO L225 Difference]: With dead ends: 253 [2018-09-30 20:25:22,091 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 20:25:22,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:25:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 20:25:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 20:25:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 20:25:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-09-30 20:25:22,094 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 246 [2018-09-30 20:25:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:22,094 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-09-30 20:25:22,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:25:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-09-30 20:25:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 20:25:22,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:22,096 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:22,096 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:22,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:22,096 INFO L82 PathProgramCache]: Analyzing trace with hash 665290254, now seen corresponding path program 61 times [2018-09-30 20:25:22,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:22,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:22,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:22,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:22,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:23,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:23,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:23,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:23,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:23,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:23,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:25:23,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:25:23,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:25:23,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:25:23,863 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 64 states. [2018-09-30 20:25:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:24,011 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-09-30 20:25:24,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:25:24,011 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-09-30 20:25:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:24,012 INFO L225 Difference]: With dead ends: 257 [2018-09-30 20:25:24,012 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 20:25:24,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:25:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 20:25:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-30 20:25:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 20:25:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-09-30 20:25:24,015 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 250 [2018-09-30 20:25:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:24,015 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-09-30 20:25:24,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:25:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-09-30 20:25:24,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 20:25:24,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:24,016 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:24,016 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:24,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1066081464, now seen corresponding path program 62 times [2018-09-30 20:25:24,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:24,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:24,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:24,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:24,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:25,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:25,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:25,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:25,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:25,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:25,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:25,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:25,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:25:25,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:25:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:25:25,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:25:25,890 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 65 states. [2018-09-30 20:25:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:26,045 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-09-30 20:25:26,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:25:26,046 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-09-30 20:25:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:26,047 INFO L225 Difference]: With dead ends: 261 [2018-09-30 20:25:26,048 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 20:25:26,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:25:26,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 20:25:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 20:25:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 20:25:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-09-30 20:25:26,051 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 254 [2018-09-30 20:25:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:26,052 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-09-30 20:25:26,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:25:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-09-30 20:25:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 20:25:26,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:26,053 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:26,053 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:26,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:26,054 INFO L82 PathProgramCache]: Analyzing trace with hash -116437406, now seen corresponding path program 63 times [2018-09-30 20:25:26,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:26,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:26,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:26,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:26,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:27,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:27,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:27,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:27,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 20:25:27,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:27,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:27,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:27,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 20:25:27,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:25:27,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:25:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:25:27,745 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 66 states. [2018-09-30 20:25:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:27,929 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-09-30 20:25:27,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:25:27,930 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-09-30 20:25:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:27,931 INFO L225 Difference]: With dead ends: 265 [2018-09-30 20:25:27,932 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 20:25:27,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:25:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 20:25:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-30 20:25:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 20:25:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-09-30 20:25:27,936 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 258 [2018-09-30 20:25:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:27,936 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-09-30 20:25:27,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:25:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-09-30 20:25:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 20:25:27,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:27,938 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:27,938 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:27,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash 208575244, now seen corresponding path program 64 times [2018-09-30 20:25:27,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:27,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:27,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:27,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:27,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:30,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:30,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:30,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:30,068 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:30,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:30,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:30,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:30,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:25:30,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:25:30,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:25:30,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:25:30,154 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 67 states. [2018-09-30 20:25:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:30,379 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-09-30 20:25:30,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:25:30,379 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-09-30 20:25:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:30,381 INFO L225 Difference]: With dead ends: 269 [2018-09-30 20:25:30,381 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 20:25:30,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:25:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 20:25:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-30 20:25:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-30 20:25:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-09-30 20:25:30,385 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 262 [2018-09-30 20:25:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:30,386 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-09-30 20:25:30,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:25:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-09-30 20:25:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 20:25:30,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:30,387 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:30,387 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:30,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:30,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1868332362, now seen corresponding path program 65 times [2018-09-30 20:25:30,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:30,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:30,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:30,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:30,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:32,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:32,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:32,046 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:32,139 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 20:25:32,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:32,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:32,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:32,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:25:32,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:25:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:25:32,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:25:32,227 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 68 states. [2018-09-30 20:25:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:32,405 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-09-30 20:25:32,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:25:32,406 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-09-30 20:25:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:32,408 INFO L225 Difference]: With dead ends: 273 [2018-09-30 20:25:32,408 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 20:25:32,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:25:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 20:25:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 20:25:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 20:25:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-09-30 20:25:32,412 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 266 [2018-09-30 20:25:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:32,413 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-09-30 20:25:32,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:25:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-09-30 20:25:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-30 20:25:32,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:32,414 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:32,414 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:32,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:32,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1687648928, now seen corresponding path program 66 times [2018-09-30 20:25:32,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:32,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:32,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:32,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:32,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:34,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:34,119 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:34,213 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:25:34,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:34,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:34,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 20:25:34,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:25:34,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:25:34,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:25:34,305 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 69 states. [2018-09-30 20:25:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:34,505 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-09-30 20:25:34,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:25:34,505 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-09-30 20:25:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:34,506 INFO L225 Difference]: With dead ends: 277 [2018-09-30 20:25:34,506 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 20:25:34,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:25:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 20:25:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-30 20:25:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 20:25:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-09-30 20:25:34,509 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 270 [2018-09-30 20:25:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:34,509 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-09-30 20:25:34,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:25:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-09-30 20:25:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-30 20:25:34,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:34,511 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:34,511 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:34,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash -516414710, now seen corresponding path program 67 times [2018-09-30 20:25:34,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:34,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:34,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:34,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:36,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:36,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:36,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:36,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:25:36,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:25:36,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:25:36,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:25:36,373 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 70 states. [2018-09-30 20:25:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:36,607 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-09-30 20:25:36,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:25:36,607 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-09-30 20:25:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:36,609 INFO L225 Difference]: With dead ends: 281 [2018-09-30 20:25:36,609 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 20:25:36,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:25:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 20:25:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-30 20:25:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-30 20:25:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-09-30 20:25:36,613 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 274 [2018-09-30 20:25:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:36,613 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-09-30 20:25:36,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:25:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-09-30 20:25:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 20:25:36,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:36,615 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:36,615 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:36,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:36,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1431100340, now seen corresponding path program 68 times [2018-09-30 20:25:36,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:36,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:36,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:36,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:38,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:38,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:38,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:38,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:38,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:38,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:25:38,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:25:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:25:38,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:25:38,600 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 71 states. [2018-09-30 20:25:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:38,826 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-09-30 20:25:38,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:25:38,826 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-09-30 20:25:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:38,828 INFO L225 Difference]: With dead ends: 285 [2018-09-30 20:25:38,828 INFO L226 Difference]: Without dead ends: 283 [2018-09-30 20:25:38,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:25:38,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-30 20:25:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-30 20:25:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-30 20:25:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-09-30 20:25:38,832 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 278 [2018-09-30 20:25:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:38,832 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-09-30 20:25:38,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:25:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-09-30 20:25:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-30 20:25:38,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:38,833 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:38,833 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:38,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash -912183458, now seen corresponding path program 69 times [2018-09-30 20:25:38,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:38,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:38,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:38,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:40,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:40,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:40,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:41,039 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 20:25:41,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:41,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:41,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:41,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 20:25:41,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:25:41,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:25:41,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:25:41,160 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 72 states. [2018-09-30 20:25:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:41,411 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-09-30 20:25:41,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:25:41,412 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-09-30 20:25:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:41,414 INFO L225 Difference]: With dead ends: 289 [2018-09-30 20:25:41,414 INFO L226 Difference]: Without dead ends: 287 [2018-09-30 20:25:41,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:25:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-30 20:25:41,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-30 20:25:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-30 20:25:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-09-30 20:25:41,417 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 282 [2018-09-30 20:25:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:41,418 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-09-30 20:25:41,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:25:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-09-30 20:25:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-30 20:25:41,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:41,419 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:41,419 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:41,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:41,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1896899064, now seen corresponding path program 70 times [2018-09-30 20:25:41,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:41,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:41,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:41,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:41,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:43,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:43,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:43,277 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:43,336 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:43,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:43,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:43,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:43,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:25:43,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:25:43,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:25:43,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:25:43,421 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 73 states. [2018-09-30 20:25:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:43,644 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-09-30 20:25:43,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:25:43,644 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-09-30 20:25:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:43,645 INFO L225 Difference]: With dead ends: 293 [2018-09-30 20:25:43,645 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 20:25:43,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:25:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 20:25:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-30 20:25:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-30 20:25:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-09-30 20:25:43,648 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 286 [2018-09-30 20:25:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:43,648 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-09-30 20:25:43,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:25:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-09-30 20:25:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-30 20:25:43,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:43,650 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:43,650 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:43,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash 347252658, now seen corresponding path program 71 times [2018-09-30 20:25:43,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:43,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:43,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:43,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:43,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:46,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:46,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:46,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:46,259 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 20:25:46,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:46,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:46,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:46,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:25:46,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:25:46,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:25:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:25:46,363 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 74 states. [2018-09-30 20:25:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:46,608 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-09-30 20:25:46,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:25:46,608 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-09-30 20:25:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:46,610 INFO L225 Difference]: With dead ends: 297 [2018-09-30 20:25:46,610 INFO L226 Difference]: Without dead ends: 295 [2018-09-30 20:25:46,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:25:46,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-30 20:25:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-09-30 20:25:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-30 20:25:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-09-30 20:25:46,614 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 290 [2018-09-30 20:25:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:46,615 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-09-30 20:25:46,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:25:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-09-30 20:25:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-30 20:25:46,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:46,617 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:46,617 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:46,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1994077092, now seen corresponding path program 72 times [2018-09-30 20:25:46,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:46,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:46,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:46,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:46,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:48,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:48,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:48,631 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:48,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:25:48,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:48,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:48,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:48,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 20:25:48,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:25:48,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:25:48,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:25:48,834 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 75 states. [2018-09-30 20:25:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:49,088 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-09-30 20:25:49,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:25:49,089 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-09-30 20:25:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:49,090 INFO L225 Difference]: With dead ends: 301 [2018-09-30 20:25:49,090 INFO L226 Difference]: Without dead ends: 299 [2018-09-30 20:25:49,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:25:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-30 20:25:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-30 20:25:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-30 20:25:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-09-30 20:25:49,094 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 294 [2018-09-30 20:25:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:49,094 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-09-30 20:25:49,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:25:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-09-30 20:25:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-30 20:25:49,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:49,095 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:49,096 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:49,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2034273286, now seen corresponding path program 73 times [2018-09-30 20:25:49,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:49,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:49,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:49,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:49,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:51,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:51,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:51,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:51,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:51,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:51,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:25:51,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:25:51,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:25:51,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:25:51,539 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 76 states. [2018-09-30 20:25:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:51,818 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-09-30 20:25:51,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:25:51,819 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-09-30 20:25:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:51,821 INFO L225 Difference]: With dead ends: 305 [2018-09-30 20:25:51,821 INFO L226 Difference]: Without dead ends: 303 [2018-09-30 20:25:51,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:25:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-30 20:25:51,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-09-30 20:25:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-30 20:25:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-09-30 20:25:51,825 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 298 [2018-09-30 20:25:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:51,825 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-09-30 20:25:51,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:25:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-09-30 20:25:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-30 20:25:51,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:51,826 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:51,826 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:51,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:51,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1891657392, now seen corresponding path program 74 times [2018-09-30 20:25:51,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:51,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:51,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:51,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:51,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:53,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:53,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:53,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:53,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:53,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:53,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:54,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:54,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:25:54,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:25:54,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:25:54,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:25:54,018 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 77 states. [2018-09-30 20:25:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:54,192 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-09-30 20:25:54,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:25:54,193 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-09-30 20:25:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:54,195 INFO L225 Difference]: With dead ends: 309 [2018-09-30 20:25:54,195 INFO L226 Difference]: Without dead ends: 307 [2018-09-30 20:25:54,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:25:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-30 20:25:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-09-30 20:25:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-30 20:25:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-09-30 20:25:54,198 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 302 [2018-09-30 20:25:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:54,199 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-09-30 20:25:54,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:25:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-09-30 20:25:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-30 20:25:54,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:54,200 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:54,201 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:54,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1709253542, now seen corresponding path program 75 times [2018-09-30 20:25:54,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:54,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:54,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:54,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:54,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:56,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:56,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:56,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:56,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 20:25:56,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:56,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:56,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:56,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 20:25:56,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:25:56,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:25:56,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:25:56,862 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 78 states. [2018-09-30 20:25:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:57,303 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-09-30 20:25:57,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:25:57,304 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-09-30 20:25:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:57,306 INFO L225 Difference]: With dead ends: 313 [2018-09-30 20:25:57,306 INFO L226 Difference]: Without dead ends: 311 [2018-09-30 20:25:57,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:25:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-30 20:25:57,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-09-30 20:25:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-30 20:25:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-09-30 20:25:57,310 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 306 [2018-09-30 20:25:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:57,310 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-09-30 20:25:57,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:25:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-09-30 20:25:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-30 20:25:57,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:57,312 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2018-09-30 20:25:57,313 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:57,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:57,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1586916612, now seen corresponding path program 76 times [2018-09-30 20:25:57,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:57,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:57,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:57,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:57,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:00,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:00,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:00,994 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:01,056 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:01,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:01,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:01,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:01,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 20:26:01,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:26:01,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:26:01,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:26:01,155 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 79 states. [2018-09-30 20:26:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:01,379 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-09-30 20:26:01,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:26:01,380 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-09-30 20:26:01,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:01,382 INFO L225 Difference]: With dead ends: 317 [2018-09-30 20:26:01,382 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 20:26:01,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:26:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 20:26:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-09-30 20:26:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-30 20:26:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2018-09-30 20:26:01,386 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 310 [2018-09-30 20:26:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:01,386 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2018-09-30 20:26:01,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 20:26:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2018-09-30 20:26:01,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-30 20:26:01,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:01,387 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:01,387 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:01,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:01,388 INFO L82 PathProgramCache]: Analyzing trace with hash 102865070, now seen corresponding path program 77 times [2018-09-30 20:26:01,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:01,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:01,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:01,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:01,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:03,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:03,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:03,723 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:03,837 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 20:26:03,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:03,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:03,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:03,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:26:03,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:26:03,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:26:03,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:26:03,932 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 80 states. [2018-09-30 20:26:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:04,107 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-09-30 20:26:04,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:26:04,108 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-09-30 20:26:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:04,110 INFO L225 Difference]: With dead ends: 321 [2018-09-30 20:26:04,110 INFO L226 Difference]: Without dead ends: 319 [2018-09-30 20:26:04,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:26:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-30 20:26:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-09-30 20:26:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-30 20:26:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-09-30 20:26:04,114 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 314 [2018-09-30 20:26:04,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:04,114 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-09-30 20:26:04,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:26:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-09-30 20:26:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-30 20:26:04,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:04,116 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:04,116 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:04,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:04,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1467670360, now seen corresponding path program 78 times [2018-09-30 20:26:04,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:04,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:04,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:04,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:04,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:06,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:06,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:06,709 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:06,827 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 20:26:06,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:06,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:06,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:06,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 20:26:06,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 20:26:06,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 20:26:06,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 20:26:06,925 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 81 states. [2018-09-30 20:26:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:07,106 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-09-30 20:26:07,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:26:07,107 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-09-30 20:26:07,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:07,108 INFO L225 Difference]: With dead ends: 325 [2018-09-30 20:26:07,109 INFO L226 Difference]: Without dead ends: 323 [2018-09-30 20:26:07,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 20:26:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-30 20:26:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-09-30 20:26:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-09-30 20:26:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-09-30 20:26:07,112 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 318 [2018-09-30 20:26:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:07,113 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-09-30 20:26:07,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 20:26:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-09-30 20:26:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-30 20:26:07,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:07,114 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:07,114 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:07,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash 941408514, now seen corresponding path program 79 times [2018-09-30 20:26:07,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:07,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:07,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:07,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:07,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:09,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:09,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:09,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:09,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:09,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:09,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:26:09,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:26:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:26:09,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:26:09,601 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 82 states. [2018-09-30 20:26:09,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:09,769 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-09-30 20:26:09,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:26:09,769 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-09-30 20:26:09,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:09,771 INFO L225 Difference]: With dead ends: 329 [2018-09-30 20:26:09,771 INFO L226 Difference]: Without dead ends: 327 [2018-09-30 20:26:09,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:26:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-30 20:26:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-09-30 20:26:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-09-30 20:26:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2018-09-30 20:26:09,775 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 322 [2018-09-30 20:26:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:09,775 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2018-09-30 20:26:09,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:26:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2018-09-30 20:26:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-30 20:26:09,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:09,777 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:09,777 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:09,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1279376812, now seen corresponding path program 80 times [2018-09-30 20:26:09,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:09,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:09,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:12,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:12,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:12,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:12,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:12,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:12,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:12,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:12,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 20:26:12,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:26:12,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:26:12,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:26:12,679 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 83 states. [2018-09-30 20:26:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:13,001 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-09-30 20:26:13,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:26:13,001 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-09-30 20:26:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:13,003 INFO L225 Difference]: With dead ends: 333 [2018-09-30 20:26:13,003 INFO L226 Difference]: Without dead ends: 331 [2018-09-30 20:26:13,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:26:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-30 20:26:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-09-30 20:26:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-09-30 20:26:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-09-30 20:26:13,008 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 326 [2018-09-30 20:26:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:13,008 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-09-30 20:26:13,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:26:13,008 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-09-30 20:26:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-30 20:26:13,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:13,009 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:13,009 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:13,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1763420842, now seen corresponding path program 81 times [2018-09-30 20:26:13,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:13,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:13,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:13,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:13,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:15,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:15,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:15,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:15,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 20:26:15,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:15,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:16,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:16,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 20:26:16,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:26:16,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:26:16,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:26:16,051 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 84 states. [2018-09-30 20:26:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:16,324 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-09-30 20:26:16,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:26:16,324 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-09-30 20:26:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:16,326 INFO L225 Difference]: With dead ends: 337 [2018-09-30 20:26:16,326 INFO L226 Difference]: Without dead ends: 335 [2018-09-30 20:26:16,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:26:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-09-30 20:26:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-09-30 20:26:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-09-30 20:26:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2018-09-30 20:26:16,328 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 330 [2018-09-30 20:26:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:16,329 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2018-09-30 20:26:16,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:26:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2018-09-30 20:26:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-09-30 20:26:16,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:16,330 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:16,330 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:16,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:16,331 INFO L82 PathProgramCache]: Analyzing trace with hash 431949824, now seen corresponding path program 82 times [2018-09-30 20:26:16,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:16,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:16,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:16,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:16,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:18,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:18,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:18,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:18,931 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:18,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:18,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:19,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:19,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 20:26:19,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 20:26:19,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 20:26:19,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:26:19,083 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 85 states. [2018-09-30 20:26:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:19,425 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-09-30 20:26:19,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:26:19,426 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-09-30 20:26:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:19,428 INFO L225 Difference]: With dead ends: 341 [2018-09-30 20:26:19,428 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 20:26:19,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:26:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 20:26:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-09-30 20:26:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-30 20:26:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-09-30 20:26:19,432 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 334 [2018-09-30 20:26:19,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:19,432 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-09-30 20:26:19,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 20:26:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-09-30 20:26:19,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-30 20:26:19,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:19,433 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:19,434 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:19,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:19,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1967936938, now seen corresponding path program 83 times [2018-09-30 20:26:19,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:19,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:19,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:19,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:19,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:22,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:22,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:22,377 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:22,516 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 20:26:22,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:22,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:22,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:22,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:26:22,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:26:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:26:22,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:26:22,624 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 86 states. [2018-09-30 20:26:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:22,908 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-09-30 20:26:22,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:26:22,909 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-09-30 20:26:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:22,911 INFO L225 Difference]: With dead ends: 345 [2018-09-30 20:26:22,911 INFO L226 Difference]: Without dead ends: 343 [2018-09-30 20:26:22,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:26:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-30 20:26:22,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-09-30 20:26:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-09-30 20:26:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-09-30 20:26:22,915 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 338 [2018-09-30 20:26:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:22,916 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-09-30 20:26:22,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:26:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-09-30 20:26:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-30 20:26:22,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:22,918 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:22,918 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:22,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2000241068, now seen corresponding path program 84 times [2018-09-30 20:26:22,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:22,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:22,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:22,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:22,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:25,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:25,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:25,871 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:26,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 20:26:26,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:26,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:26,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:26,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 20:26:26,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 20:26:26,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 20:26:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:26:26,111 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 87 states. [2018-09-30 20:26:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:26,460 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-09-30 20:26:26,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:26:26,460 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-09-30 20:26:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:26,462 INFO L225 Difference]: With dead ends: 349 [2018-09-30 20:26:26,462 INFO L226 Difference]: Without dead ends: 347 [2018-09-30 20:26:26,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:26:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-09-30 20:26:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-09-30 20:26:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-09-30 20:26:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-09-30 20:26:26,467 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 342 [2018-09-30 20:26:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:26,467 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-09-30 20:26:26,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 20:26:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-09-30 20:26:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-30 20:26:26,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:26,469 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:26,469 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:26,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:26,470 INFO L82 PathProgramCache]: Analyzing trace with hash 304660990, now seen corresponding path program 85 times [2018-09-30 20:26:26,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:26,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:26,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:26,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:26,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:29,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:29,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:29,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:29,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:29,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:29,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 20:26:29,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:26:29,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:26:29,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:26:29,382 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 88 states. [2018-09-30 20:26:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:29,711 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-09-30 20:26:29,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:26:29,711 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-09-30 20:26:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:29,713 INFO L225 Difference]: With dead ends: 353 [2018-09-30 20:26:29,713 INFO L226 Difference]: Without dead ends: 351 [2018-09-30 20:26:29,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:26:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-30 20:26:29,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-09-30 20:26:29,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-30 20:26:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2018-09-30 20:26:29,716 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 346 [2018-09-30 20:26:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:29,716 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2018-09-30 20:26:29,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:26:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2018-09-30 20:26:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-09-30 20:26:29,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:29,718 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:29,718 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:29,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:29,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1311563944, now seen corresponding path program 86 times [2018-09-30 20:26:29,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:29,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:29,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:29,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:29,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:32,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:32,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:32,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:32,901 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:32,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:32,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:33,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:33,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 20:26:33,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:26:33,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:26:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:26:33,017 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand 89 states. [2018-09-30 20:26:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:33,420 INFO L93 Difference]: Finished difference Result 357 states and 357 transitions. [2018-09-30 20:26:33,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:26:33,421 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-09-30 20:26:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:33,423 INFO L225 Difference]: With dead ends: 357 [2018-09-30 20:26:33,423 INFO L226 Difference]: Without dead ends: 355 [2018-09-30 20:26:33,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:26:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-09-30 20:26:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-09-30 20:26:33,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-09-30 20:26:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2018-09-30 20:26:33,427 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 350 [2018-09-30 20:26:33,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:33,427 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2018-09-30 20:26:33,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:26:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2018-09-30 20:26:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-30 20:26:33,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:33,429 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:33,429 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:33,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:33,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1739744686, now seen corresponding path program 87 times [2018-09-30 20:26:33,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:33,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:33,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:33,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:33,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:36,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:36,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:36,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:36,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 20:26:36,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:36,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:36,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:36,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 20:26:36,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:26:36,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:26:36,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:26:36,817 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 90 states. [2018-09-30 20:26:37,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:37,051 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2018-09-30 20:26:37,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:26:37,051 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-09-30 20:26:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:37,052 INFO L225 Difference]: With dead ends: 361 [2018-09-30 20:26:37,052 INFO L226 Difference]: Without dead ends: 359 [2018-09-30 20:26:37,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:26:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-09-30 20:26:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-09-30 20:26:37,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-09-30 20:26:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2018-09-30 20:26:37,056 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 354 [2018-09-30 20:26:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:37,057 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2018-09-30 20:26:37,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:26:37,057 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2018-09-30 20:26:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-09-30 20:26:37,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:37,059 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:37,059 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:37,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash 180711164, now seen corresponding path program 88 times [2018-09-30 20:26:37,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:37,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:37,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:37,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:39,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:39,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:39,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:40,076 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:40,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:40,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:40,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:40,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 20:26:40,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 20:26:40,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 20:26:40,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 20:26:40,220 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand 91 states. [2018-09-30 20:26:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:40,636 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-09-30 20:26:40,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:26:40,637 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 358 [2018-09-30 20:26:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:40,639 INFO L225 Difference]: With dead ends: 365 [2018-09-30 20:26:40,639 INFO L226 Difference]: Without dead ends: 363 [2018-09-30 20:26:40,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 20:26:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-30 20:26:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-09-30 20:26:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-09-30 20:26:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-09-30 20:26:40,643 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 358 [2018-09-30 20:26:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:40,643 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-09-30 20:26:40,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 20:26:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-09-30 20:26:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-09-30 20:26:40,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:40,645 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:40,645 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:40,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash 512679590, now seen corresponding path program 89 times [2018-09-30 20:26:40,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:40,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:40,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:40,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:40,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:43,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:43,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:43,966 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:44,125 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 20:26:44,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:44,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:44,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:44,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 20:26:44,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:26:44,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:26:44,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:26:44,243 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 92 states. [2018-09-30 20:26:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:44,662 INFO L93 Difference]: Finished difference Result 369 states and 369 transitions. [2018-09-30 20:26:44,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:26:44,663 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 362 [2018-09-30 20:26:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:44,665 INFO L225 Difference]: With dead ends: 369 [2018-09-30 20:26:44,665 INFO L226 Difference]: Without dead ends: 367 [2018-09-30 20:26:44,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:26:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-09-30 20:26:44,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2018-09-30 20:26:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-09-30 20:26:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 367 transitions. [2018-09-30 20:26:44,669 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 367 transitions. Word has length 362 [2018-09-30 20:26:44,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:44,669 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 367 transitions. [2018-09-30 20:26:44,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:26:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 367 transitions. [2018-09-30 20:26:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-30 20:26:44,670 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:44,671 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:44,671 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:44,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:44,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1264871760, now seen corresponding path program 90 times [2018-09-30 20:26:44,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:44,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:44,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:44,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:44,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:48,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:48,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:48,062 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:48,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 20:26:48,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:48,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:48,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:48,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 20:26:48,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 20:26:48,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 20:26:48,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 20:26:48,362 INFO L87 Difference]: Start difference. First operand 367 states and 367 transitions. Second operand 93 states. [2018-09-30 20:26:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:48,747 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-09-30 20:26:48,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:26:48,748 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 366 [2018-09-30 20:26:48,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:48,750 INFO L225 Difference]: With dead ends: 373 [2018-09-30 20:26:48,750 INFO L226 Difference]: Without dead ends: 371 [2018-09-30 20:26:48,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 20:26:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-09-30 20:26:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2018-09-30 20:26:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-09-30 20:26:48,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2018-09-30 20:26:48,754 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 366 [2018-09-30 20:26:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:48,754 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2018-09-30 20:26:48,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 20:26:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2018-09-30 20:26:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-09-30 20:26:48,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:48,756 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:48,756 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:48,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:48,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1480552710, now seen corresponding path program 91 times [2018-09-30 20:26:48,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:48,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:48,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:48,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:48,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:52,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:52,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:52,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:52,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:52,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:52,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 20:26:52,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:26:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:26:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:26:52,362 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 94 states. [2018-09-30 20:26:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:52,841 INFO L93 Difference]: Finished difference Result 377 states and 377 transitions. [2018-09-30 20:26:52,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:26:52,841 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 370 [2018-09-30 20:26:52,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:52,844 INFO L225 Difference]: With dead ends: 377 [2018-09-30 20:26:52,844 INFO L226 Difference]: Without dead ends: 375 [2018-09-30 20:26:52,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:26:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-30 20:26:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2018-09-30 20:26:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-09-30 20:26:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2018-09-30 20:26:52,847 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 370 [2018-09-30 20:26:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:52,848 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2018-09-30 20:26:52,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:26:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2018-09-30 20:26:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-09-30 20:26:52,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:52,849 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:52,849 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:52,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:52,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1998729308, now seen corresponding path program 92 times [2018-09-30 20:26:52,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:52,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:52,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:52,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:52,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:56,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:56,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:56,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:57,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:57,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:57,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:57,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:57,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 20:26:57,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 20:26:57,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 20:26:57,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:26:57,143 INFO L87 Difference]: Start difference. First operand 375 states and 375 transitions. Second operand 95 states. [2018-09-30 20:26:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:57,577 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2018-09-30 20:26:57,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:26:57,577 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 374 [2018-09-30 20:26:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:57,580 INFO L225 Difference]: With dead ends: 381 [2018-09-30 20:26:57,580 INFO L226 Difference]: Without dead ends: 379 [2018-09-30 20:26:57,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:26:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-09-30 20:26:57,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2018-09-30 20:26:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-09-30 20:26:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2018-09-30 20:26:57,584 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 374 [2018-09-30 20:26:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:57,584 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2018-09-30 20:26:57,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 20:26:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2018-09-30 20:26:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-09-30 20:26:57,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:57,586 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1] [2018-09-30 20:26:57,586 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:57,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:57,587 INFO L82 PathProgramCache]: Analyzing trace with hash 582396750, now seen corresponding path program 93 times [2018-09-30 20:26:57,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:57,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:57,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:57,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:57,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:00,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:00,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:00,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:00,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 20:27:00,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:00,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:01,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:01,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 20:27:01,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:27:01,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:27:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:27:01,093 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 96 states. [2018-09-30 20:27:01,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:01,345 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2018-09-30 20:27:01,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:27:01,345 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 378 [2018-09-30 20:27:01,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:01,346 INFO L225 Difference]: With dead ends: 385 [2018-09-30 20:27:01,346 INFO L226 Difference]: Without dead ends: 383 [2018-09-30 20:27:01,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:27:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-09-30 20:27:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-09-30 20:27:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-09-30 20:27:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2018-09-30 20:27:01,350 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 378 [2018-09-30 20:27:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:01,350 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2018-09-30 20:27:01,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:27:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2018-09-30 20:27:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-09-30 20:27:01,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:01,352 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:01,352 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:01,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:01,352 INFO L82 PathProgramCache]: Analyzing trace with hash 671457784, now seen corresponding path program 94 times [2018-09-30 20:27:01,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:01,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:01,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:01,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:01,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:04,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:04,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:04,912 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:04,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:04,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:04,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:05,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:05,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 20:27:05,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 20:27:05,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 20:27:05,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 20:27:05,134 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand 97 states. [2018-09-30 20:27:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:05,601 INFO L93 Difference]: Finished difference Result 389 states and 389 transitions. [2018-09-30 20:27:05,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:27:05,602 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 382 [2018-09-30 20:27:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:05,604 INFO L225 Difference]: With dead ends: 389 [2018-09-30 20:27:05,604 INFO L226 Difference]: Without dead ends: 387 [2018-09-30 20:27:05,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 20:27:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-30 20:27:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2018-09-30 20:27:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-09-30 20:27:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2018-09-30 20:27:05,609 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 382 [2018-09-30 20:27:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:05,609 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2018-09-30 20:27:05,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 20:27:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2018-09-30 20:27:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-09-30 20:27:05,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:05,610 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:05,611 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:05,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:05,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1782920098, now seen corresponding path program 95 times [2018-09-30 20:27:05,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:05,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:05,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:05,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:05,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:09,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:09,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:09,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:09,414 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 20:27:09,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:09,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:09,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:09,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 20:27:09,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:27:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:27:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:27:09,542 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 98 states. [2018-09-30 20:27:10,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:10,075 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-09-30 20:27:10,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:27:10,076 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 386 [2018-09-30 20:27:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:10,078 INFO L225 Difference]: With dead ends: 393 [2018-09-30 20:27:10,078 INFO L226 Difference]: Without dead ends: 391 [2018-09-30 20:27:10,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:27:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-09-30 20:27:10,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2018-09-30 20:27:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-09-30 20:27:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 391 transitions. [2018-09-30 20:27:10,082 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 391 transitions. Word has length 386 [2018-09-30 20:27:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:10,082 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 391 transitions. [2018-09-30 20:27:10,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:27:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 391 transitions. [2018-09-30 20:27:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-09-30 20:27:10,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:10,084 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:10,084 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:10,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2041569356, now seen corresponding path program 96 times [2018-09-30 20:27:10,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:10,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:10,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:10,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:10,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:13,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:13,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:13,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:13,902 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 20:27:13,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:13,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:14,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:14,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 20:27:14,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 20:27:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 20:27:14,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 20:27:14,039 INFO L87 Difference]: Start difference. First operand 391 states and 391 transitions. Second operand 99 states. [2018-09-30 20:27:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:14,542 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2018-09-30 20:27:14,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:27:14,542 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 390 [2018-09-30 20:27:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:14,543 INFO L225 Difference]: With dead ends: 397 [2018-09-30 20:27:14,543 INFO L226 Difference]: Without dead ends: 395 [2018-09-30 20:27:14,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 20:27:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-09-30 20:27:14,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2018-09-30 20:27:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-09-30 20:27:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2018-09-30 20:27:14,548 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 390 [2018-09-30 20:27:14,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:14,548 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2018-09-30 20:27:14,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 20:27:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2018-09-30 20:27:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-09-30 20:27:14,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:14,550 INFO L375 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:14,550 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:14,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:14,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1161832438, now seen corresponding path program 97 times [2018-09-30 20:27:14,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:14,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:14,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:14,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:14,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:18,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:18,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:18,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:18,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:18,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:18,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 20:27:18,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:27:18,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:27:18,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:27:18,503 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 100 states. [2018-09-30 20:27:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:19,046 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-09-30 20:27:19,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:27:19,046 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 394 [2018-09-30 20:27:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:19,049 INFO L225 Difference]: With dead ends: 401 [2018-09-30 20:27:19,049 INFO L226 Difference]: Without dead ends: 399 [2018-09-30 20:27:19,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:27:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-30 20:27:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2018-09-30 20:27:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-09-30 20:27:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 399 transitions. [2018-09-30 20:27:19,053 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 399 transitions. Word has length 394 [2018-09-30 20:27:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:19,053 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 399 transitions. [2018-09-30 20:27:19,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:27:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 399 transitions. [2018-09-30 20:27:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-09-30 20:27:19,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:19,055 INFO L375 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:19,055 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:19,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:19,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1162835296, now seen corresponding path program 98 times [2018-09-30 20:27:19,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:19,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:19,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:19,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:19,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:22,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:22,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:22,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:23,024 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:23,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:23,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:23,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:23,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 20:27:23,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 20:27:23,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 20:27:23,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 20:27:23,177 INFO L87 Difference]: Start difference. First operand 399 states and 399 transitions. Second operand 101 states. [2018-09-30 20:27:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:23,758 INFO L93 Difference]: Finished difference Result 405 states and 405 transitions. [2018-09-30 20:27:23,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 20:27:23,758 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 398 [2018-09-30 20:27:23,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:23,760 INFO L225 Difference]: With dead ends: 405 [2018-09-30 20:27:23,761 INFO L226 Difference]: Without dead ends: 403 [2018-09-30 20:27:23,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 20:27:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-09-30 20:27:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2018-09-30 20:27:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-09-30 20:27:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-09-30 20:27:23,765 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 398 [2018-09-30 20:27:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:23,765 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-09-30 20:27:23,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 20:27:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-09-30 20:27:23,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-09-30 20:27:23,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:23,767 INFO L375 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:23,767 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:23,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:23,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1719371850, now seen corresponding path program 99 times [2018-09-30 20:27:23,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:23,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:23,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:23,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:23,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:27,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:27,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:27,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:27,770 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 20:27:27,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:27,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:27,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:27,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 20:27:27,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:27:27,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:27:27,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:27:27,924 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 102 states. [2018-09-30 20:27:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:28,270 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2018-09-30 20:27:28,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:27:28,271 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 402 [2018-09-30 20:27:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:28,273 INFO L225 Difference]: With dead ends: 409 [2018-09-30 20:27:28,273 INFO L226 Difference]: Without dead ends: 407 [2018-09-30 20:27:28,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:27:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-09-30 20:27:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-09-30 20:27:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-09-30 20:27:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2018-09-30 20:27:28,279 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 402 [2018-09-30 20:27:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:28,279 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2018-09-30 20:27:28,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:27:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2018-09-30 20:27:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-09-30 20:27:28,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:28,282 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:28,282 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:28,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:28,282 INFO L82 PathProgramCache]: Analyzing trace with hash 333160692, now seen corresponding path program 100 times [2018-09-30 20:27:28,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:28,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:28,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:28,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:28,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:32,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:32,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:32,108 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:32,186 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:32,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:32,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:32,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:32,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 20:27:32,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 20:27:32,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 20:27:32,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 20:27:32,324 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 103 states. [2018-09-30 20:27:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:32,934 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-09-30 20:27:32,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:27:32,934 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 406 [2018-09-30 20:27:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:32,937 INFO L225 Difference]: With dead ends: 413 [2018-09-30 20:27:32,937 INFO L226 Difference]: Without dead ends: 411 [2018-09-30 20:27:32,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 20:27:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-30 20:27:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2018-09-30 20:27:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-09-30 20:27:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2018-09-30 20:27:32,942 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 406 [2018-09-30 20:27:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:32,943 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2018-09-30 20:27:32,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 20:27:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2018-09-30 20:27:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-09-30 20:27:32,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:32,945 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:32,945 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:32,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1825264798, now seen corresponding path program 101 times [2018-09-30 20:27:32,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:32,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:32,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:32,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:32,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:36,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:36,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:36,835 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:37,014 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 20:27:37,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:37,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:37,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:37,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 20:27:37,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:27:37,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:27:37,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:27:37,187 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 104 states. [2018-09-30 20:27:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:37,734 INFO L93 Difference]: Finished difference Result 417 states and 417 transitions. [2018-09-30 20:27:37,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:27:37,735 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 410 [2018-09-30 20:27:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:37,736 INFO L225 Difference]: With dead ends: 417 [2018-09-30 20:27:37,736 INFO L226 Difference]: Without dead ends: 415 [2018-09-30 20:27:37,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:27:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-09-30 20:27:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-09-30 20:27:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-09-30 20:27:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 415 transitions. [2018-09-30 20:27:37,741 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 415 transitions. Word has length 410 [2018-09-30 20:27:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:37,742 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 415 transitions. [2018-09-30 20:27:37,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:27:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 415 transitions. [2018-09-30 20:27:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-09-30 20:27:37,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:37,744 INFO L375 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:37,744 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:37,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1710939320, now seen corresponding path program 102 times [2018-09-30 20:27:37,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:37,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:37,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:37,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:37,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:41,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:41,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:41,638 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:41,822 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 20:27:41,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:41,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:41,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:41,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 20:27:41,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 20:27:41,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 20:27:41,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 20:27:41,961 INFO L87 Difference]: Start difference. First operand 415 states and 415 transitions. Second operand 105 states. [2018-09-30 20:27:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:42,489 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-09-30 20:27:42,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 20:27:42,489 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 414 [2018-09-30 20:27:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:42,490 INFO L225 Difference]: With dead ends: 421 [2018-09-30 20:27:42,490 INFO L226 Difference]: Without dead ends: 419 [2018-09-30 20:27:42,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 20:27:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-09-30 20:27:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2018-09-30 20:27:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-09-30 20:27:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2018-09-30 20:27:42,493 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 414 [2018-09-30 20:27:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:42,493 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2018-09-30 20:27:42,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 20:27:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2018-09-30 20:27:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-09-30 20:27:42,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:42,495 INFO L375 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:42,495 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:42,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash -486306574, now seen corresponding path program 103 times [2018-09-30 20:27:42,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:42,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:42,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:42,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:42,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:46,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:46,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:46,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:46,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:46,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:46,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 20:27:46,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:27:46,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:27:46,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:27:46,806 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 106 states. [2018-09-30 20:27:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:47,414 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2018-09-30 20:27:47,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 20:27:47,414 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 418 [2018-09-30 20:27:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:47,415 INFO L225 Difference]: With dead ends: 425 [2018-09-30 20:27:47,415 INFO L226 Difference]: Without dead ends: 423 [2018-09-30 20:27:47,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:27:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-30 20:27:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2018-09-30 20:27:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-09-30 20:27:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-09-30 20:27:47,419 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 418 [2018-09-30 20:27:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:47,420 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-09-30 20:27:47,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:27:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-09-30 20:27:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-09-30 20:27:47,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:47,422 INFO L375 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:47,422 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:47,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:47,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1308692892, now seen corresponding path program 104 times [2018-09-30 20:27:47,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:47,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:47,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:47,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:47,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:51,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:51,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:51,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:51,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:51,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:51,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:51,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:51,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 20:27:51,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 20:27:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 20:27:51,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 20:27:51,886 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 107 states. [2018-09-30 20:27:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:52,551 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-09-30 20:27:52,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:27:52,552 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 422 [2018-09-30 20:27:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:52,552 INFO L225 Difference]: With dead ends: 429 [2018-09-30 20:27:52,553 INFO L226 Difference]: Without dead ends: 427 [2018-09-30 20:27:52,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 20:27:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-30 20:27:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2018-09-30 20:27:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2018-09-30 20:27:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2018-09-30 20:27:52,556 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 422 [2018-09-30 20:27:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:52,556 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2018-09-30 20:27:52,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 20:27:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2018-09-30 20:27:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-09-30 20:27:52,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:52,558 INFO L375 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:52,558 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:52,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:52,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1073230150, now seen corresponding path program 105 times [2018-09-30 20:27:52,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:52,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:52,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:52,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:52,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:56,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:56,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:56,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:57,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 20:27:57,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:57,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:57,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:57,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 20:27:57,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:27:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:27:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:27:57,166 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 108 states. [2018-09-30 20:27:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:57,645 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-09-30 20:27:57,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 20:27:57,645 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 426 [2018-09-30 20:27:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:57,646 INFO L225 Difference]: With dead ends: 433 [2018-09-30 20:27:57,646 INFO L226 Difference]: Without dead ends: 431 [2018-09-30 20:27:57,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:27:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-09-30 20:27:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2018-09-30 20:27:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-09-30 20:27:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2018-09-30 20:27:57,649 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 426 [2018-09-30 20:27:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:57,649 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2018-09-30 20:27:57,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:27:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2018-09-30 20:27:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-09-30 20:27:57,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:57,651 INFO L375 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1] [2018-09-30 20:27:57,651 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:57,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:57,652 INFO L82 PathProgramCache]: Analyzing trace with hash 480472048, now seen corresponding path program 106 times [2018-09-30 20:27:57,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:57,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:57,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:57,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:57,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:01,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:01,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:01,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:02,063 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:02,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:02,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:02,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:02,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 20:28:02,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 20:28:02,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 20:28:02,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 20:28:02,210 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand 109 states. [2018-09-30 20:28:02,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:02,879 INFO L93 Difference]: Finished difference Result 437 states and 437 transitions. [2018-09-30 20:28:02,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 20:28:02,879 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 430 [2018-09-30 20:28:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:02,880 INFO L225 Difference]: With dead ends: 437 [2018-09-30 20:28:02,880 INFO L226 Difference]: Without dead ends: 435 [2018-09-30 20:28:02,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 20:28:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-30 20:28:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2018-09-30 20:28:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2018-09-30 20:28:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2018-09-30 20:28:02,884 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 430 [2018-09-30 20:28:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:02,884 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2018-09-30 20:28:02,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 20:28:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2018-09-30 20:28:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-09-30 20:28:02,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:02,885 INFO L375 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1] [2018-09-30 20:28:02,886 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:02,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:02,886 INFO L82 PathProgramCache]: Analyzing trace with hash -427998822, now seen corresponding path program 107 times [2018-09-30 20:28:02,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:02,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:02,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:02,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:02,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:07,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:07,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:07,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:07,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-30 20:28:07,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:07,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:07,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:07,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 20:28:07,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:28:07,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:28:07,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:28:07,558 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 110 states. [2018-09-30 20:28:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:08,091 INFO L93 Difference]: Finished difference Result 441 states and 441 transitions. [2018-09-30 20:28:08,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 20:28:08,091 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 434 [2018-09-30 20:28:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:08,092 INFO L225 Difference]: With dead ends: 441 [2018-09-30 20:28:08,092 INFO L226 Difference]: Without dead ends: 439 [2018-09-30 20:28:08,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:28:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2018-09-30 20:28:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2018-09-30 20:28:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-09-30 20:28:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 439 transitions. [2018-09-30 20:28:08,095 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 439 transitions. Word has length 434 [2018-09-30 20:28:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:08,096 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 439 transitions. [2018-09-30 20:28:08,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:28:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 439 transitions. [2018-09-30 20:28:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-09-30 20:28:08,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:08,097 INFO L375 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1] [2018-09-30 20:28:08,097 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:08,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash -557829564, now seen corresponding path program 108 times [2018-09-30 20:28:08,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:08,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:08,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:08,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:08,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 20:28:10,790 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:28:10,795 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:28:10,795 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:28:10 BoogieIcfgContainer [2018-09-30 20:28:10,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:28:10,796 INFO L168 Benchmark]: Toolchain (without parser) took 236020.43 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 207.1 MB). Free memory was 1.5 GB in the beginning and 959.0 MB in the end (delta: 514.0 MB). Peak memory consumption was 721.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:28:10,798 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:28:10,798 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:28:10,798 INFO L168 Benchmark]: Boogie Preprocessor took 24.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:28:10,799 INFO L168 Benchmark]: RCFGBuilder took 374.92 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:28:10,799 INFO L168 Benchmark]: TraceAbstraction took 235572.18 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 207.1 MB). Free memory was 1.5 GB in the beginning and 959.0 MB in the end (delta: 492.9 MB). Peak memory consumption was 700.0 MB. Max. memory is 7.1 GB. [2018-09-30 20:28:10,801 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 374.92 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235572.18 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 207.1 MB). Free memory was 1.5 GB in the beginning and 959.0 MB in the end (delta: 492.9 MB). Peak memory consumption was 700.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 41). Cancelled while BasicCegarLoop was analyzing trace of length 439 with TraceHistMax 108, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 88 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 235.5s OverallTime, 110 OverallIterations, 108 TraceHistogramMax, 26.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 981 SDtfs, 582 SDslu, 21211 SDs, 0 SdLazy, 9551 SolverSat, 193 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29643 GetRequests, 23756 SyntacticMatches, 0 SemanticMatches, 5887 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 178.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=439occurred in iteration=109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 109 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 188.3s InterpolantComputationTime, 47520 NumberOfCodeBlocks, 47520 NumberOfCodeBlocksAsserted, 3150 NumberOfCheckSat, 47304 ConstructedInterpolants, 0 QuantifiedInterpolants, 41060932 SizeOfPredicates, 107 NumberOfNonLiveVariables, 35952 ConjunctsInSsa, 5992 ConjunctsInUnsatCore, 216 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1644804 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-28-10-810.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-28-10-810.csv Completed graceful shutdown